Abstract: In order to improve the performance of position sensorless control system of surface mounted permanent magnet synchronous motor (SPMSM), the extended state observer is applied to sensorless control of surface-mounted permanent magnet synchronous motor to estimate the rotor position angle and speed. It is proposed to estimate the rotor position by constructing an extended state observer with stator current as the main variable in two-phase stationary coordinate system and observing the armature back-EMF. An extended state observer with estimated rotor position angle as the main variable is constructed for speed estimation. This method has high accuracy of rotor position angle and speed estimation when the resistance and inductance parameters of the motor change. It is suitable for middle and high speed sensorless control of surface-mounted permanent magnet synchronous motor. The simulation and experimental results show the effectiveness of the proposed method.

Key words: Permanent magnet synchronous motor, sensorless control, extended state observer, surface-mounted

摘要： 为提高面装式永磁同步电机(SPMSM)无位置传感器控制系统的运行性能，将扩张状态观测器应用于永磁体面装式永磁同步电机的无位置传感器控制中，用以估计转子位置角和转速，提出通过在两相静止坐标系下构建以定子电流为主变量的扩张状态观测器观测电枢反电势来估计转子位置，并通过构建以估计的转子位置角为主变量的扩张状态观测器进行转速估计的方法。该方法在电机电阻及电感参数变化时仍具有较高的转子位置角和转速估计精度，适用于面装式永磁同步电机的中高速无位置传感器控制。仿真及实验结果表明了该方法的有效性。

关键词: 永磁同步电机, 无传感器控制, 扩张状态观测器, 面装式